2026/07/09 by Ziyad Imara, Z. Imara, A. El Allati +4
Computer Science · Physics and Astronomy · #Mechanical and Optical Resonators #Orbital Angular Momentum in Optics #Quantum Information and Cryptography #quant-ph
paper · pdf · doi:10.1103/rcw1-3wh7
openalex publication_date 2026/07/09 · openalex created_date 2026/07/10 · openalex updated_date 2026/07/30
Cavity optomagnomechanics provides a versatile platform to explore macroscopic quantum correlations, particularly nonreciprocal entanglement. In this work we propose a theoretical scheme to generate switchable bipartite and tripartite entanglement in an optomagnomechanical ring cavity by exploiting phase-controlled magnon squeezing. Indeed, two spatially separated ferrimagnetic yttrium iron garnet microbridges become entangled through their magnetostriction-mediated coupling to mechanical motion and a common cavity field via radiation-pressure interaction. The squeezing process introduces two phase-dependent contributions to the magnon response, namely, an effective detuning shift <a:math xmlns:a="http://www.w3.org/1998/Math/MathML"> <a:msub> <a:mi mathvariant="normal">Δ</a:mi> <a:msub> <a:mi>θ</a:mi> <a:mi>j</a:mi> </a:msub> </a:msub> </a:math> and a quadrature-damping contribution <c:math xmlns:c="http://www.w3.org/1998/Math/MathML"> <c:msub> <c:mi>κ</c:mi> <c:msub> <c:mi>θ</c:mi> <c:mi>j</c:mi> </c:msub> </c:msub> </c:math> , both of which reverse sign upon a <d:math xmlns:d="http://www.w3.org/1998/Math/MathML"> <d:mi>π</d:mi> </d:math> phase shift, providing an control to switch the entanglement response. The nonreciprocal entanglement is defined operationally through the asymmetric entanglement response under the phase reversal <e:math xmlns:e="http://www.w3.org/1998/Math/MathML"> <e:mrow> <e:msub> <e:mi>θ</e:mi> <e:mi>j</e:mi> </e:msub> <e:mo>→</e:mo> <e:msub> <e:mi>θ</e:mi> <e:mi>j</e:mi> </e:msub> <e:mo>+</e:mo> <e:mi>π</e:mi> </e:mrow> </e:math> , quantified by normalized contrast ratios <f:math xmlns:f="http://www.w3.org/1998/Math/MathML"> <f:msub> <f:mi>C</f:mi> <f:mi>E</f:mi> </f:msub> </f:math> and <g:math xmlns:g="http://www.w3.org/1998/Math/MathML"> <g:msub> <g:mi>C</g:mi> <g:mi mathvariant="script">R</g:mi> </g:msub> </g:math> , which measure the relative difference between the entanglement obtained at <i:math xmlns:i="http://www.w3.org/1998/Math/MathML"> <i:msub> <i:mi>θ</i:mi> <i:mi>j</i:mi> </i:msub> </i:math> and at the phase-reversed configuration <j:math xmlns:j="http://www.w3.org/1998/Math/MathML"> <j:mrow> <j:msub> <j:mi>θ</j:mi> <j:mi>j</j:mi> </j:msub> <j:mo>+</j:mo> <j:mi>π</j:mi> </j:mrow> </j:math> . The resulting phase-tuning method provides a flexible and robust route to achieve high-contrast bipartite and tripartite entanglement within stable parameter regions, establishing magnon squeezing as a practical quantum resource for switchable quantum correlations in hybrid platforms.